Answer:
The answer is below
Step-by-step explanation:
a) Given that the number of sample (n) = 300, therefore since n > 30, the distribution of the sample means is going to be normally distributed.
b) The mean of the distribution of sample means (also known as the Expected value of M) is equal to the population mean μ.

c) The standard deviation of the distribution of sample means is called the Standard Error of M, it is given by:

This is the expression simplified:
A
Step-by-step explanation:
because i did this and i pass this
Answer:
1,000
Step-by-step explanation:
because 800÷4=200 200×5=1,000
The correct answer is the last one.